Date.prototype.format = function(format)
{
        var o =
        {
            "M+" : this.getMonth()+1, //month
            "d+" : this.getDate(),    //day
            "h+" : this.getHours(),   //hour
            "m+" : this.getMinutes(), //minute
            "s+" : this.getSeconds(), //second
            "q+" : Math.floor((this.getMonth()+3)/3), //quarter
            "S" : this.getMilliseconds() //millisecond
        }
        if(/(y+)/.test(format))
        format=format.replace(RegExp.$1,(this.getFullYear()+"").substr(4 - RegExp.$1.length));
        for(var k in o)
        if(new RegExp("("+ k +")").test(format))
        format = format.replace(RegExp.$1,RegExp.$1.length==1 ? o[k] : ("00"+ o[k]).substr((""+ o[k]).length));
        return format;
}
